2024
DOI: 10.1021/acs.nanolett.3c04348
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Exploiting Topological Darkness in Photonic Crystal Slabs for Spatiotemporal Vortex Generation

Wenzhe Liu,
Jiajun Wang,
Yang Tang
et al.

Abstract: Spatiotemporal optical vortices (STOVs) with swirling phase singularities in space and time hold great promise for a wide range of applications across diverse fields. However, current approaches to generate STOVs lack integrability and rely on bulky free-space optical components. Here, we demonstrate routine STOV generation by harnessing the topological darkness phenomenon of a photonic crystal slab. Complete polarization conversion enforced by symmetry enables topological darkness to arise from photonic bands… Show more

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